> When the failing test is re-enabled, the _tkinter patch produces the following output:

Thanks. I found and fixed a bug in AsObj() for tuple and list. It looks like ckalloc(size) returns NULL if size is 0. Please update Python, compile and run test_tcl to see if you get a MemoryError exception instead of a crash.

I just created the issue #22336 which may fix this issue if my analysis was correct. It uses PyMem_Malloc(size) which has a well-defined behaviour when size is 0.